If you live in a place where roads are all cleared, you don't need studs, in fact, studs suck on asphalt ans snow.  Indeed, there is nothing that can beat studded tires on ice, but i doubt you're always on fucked up roads.  Good winter tires are the way to go, much more polyvalent!  Anyway, if you drive like a moron you could have 6in studs lol and crash the car no matter what, so your driving will affect a lot the driveability of your car in winter!